Contributors HT: manuscript writing and drafting; MO, HT, KT: revising the manuscript critically for important intellectual content; MO,
KS, HH, RO, HT, KT: final approval of the version to be published.

Introduction

Page kidney results from a perirenal haematoma or a mass around the kidney, which causes extrinsic compression on the renal
parenchyma and is a very rare cause of secondary hypertension.1 Page kidney, first described in 1939 by Page in an animal model with cellophane papers wrapped round the kidney, results
in a consequent decrease in renal blood flow, hyperreninemia, hypertension and deterioration of renal function. We experienced
Page kidney during a course of granulomatosis with polyangiitis (Wegener's) (GPA), with CT findings showing accumulation of
blood in the perinephric space due to a spontaneous perinephric haemorrhage (SPH).